+#include <vnet/l2/l2_input.h>
+#include <vnet/l2/l2_output.h>
+#include <vnet/l2/l2_vtr.h>
+
+u8 *
+format_vtr (u8 * s, va_list * args)
+{
+ u32 vtr_op = va_arg (*args, u32);
+ u32 dot1q = va_arg (*args, u32);
+ u32 tag1 = va_arg (*args, u32);
+ u32 tag2 = va_arg (*args, u32);
+ switch (vtr_op)
+ {
+ case L2_VTR_DISABLED:
+ return format (s, "none");
+ case L2_VTR_PUSH_1:
+ return format (s, "push-1 %s %d", dot1q ? "dot1q" : "dot1ad", tag1);
+ case L2_VTR_PUSH_2:
+ return format (s, "push-2 %s %d %d", dot1q ? "dot1q" : "dot1ad", tag1,
+ tag2);
+ case L2_VTR_POP_1:
+ return format (s, "pop-1");
+ case L2_VTR_POP_2:
+ return format (s, "pop-2");
+ case L2_VTR_TRANSLATE_1_1:
+ return format (s, "trans-1-1 %s %d", dot1q ? "dot1q" : "dot1ad", tag1);
+ case L2_VTR_TRANSLATE_1_2:
+ return format (s, "trans-1-2 %s %d %d", dot1q ? "dot1q" : "dot1ad",
+ tag1, tag2);
+ case L2_VTR_TRANSLATE_2_1:
+ return format (s, "trans-2-1 %s %d", dot1q ? "dot1q" : "dot1ad", tag1);
+ case L2_VTR_TRANSLATE_2_2:
+ return format (s, "trans-2-2 %s %d %d", dot1q ? "dot1q" : "dot1ad",
+ tag1, tag2);
+ default:
+ return format (s, "none");
+ }
+}